Exploració per autor "Fernández Francos, Xavier"
Ara es mostren els items 1-20 de 81
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Analysis of the reaction mechanism of the thiol-epoxy addition initiated by nucleophilic tertiary amines
(2017-10-14)
Article
Accés obertA kinetic model for thiol–epoxy crosslinking initiated by tertiary amines has been proposed. The kinetic model is based on mechanistic considerations and it features the effect of the initiator, hydroxyl content, and ... -
A new two-stage curing system: Thiol-ene/epoxy homopolymerization using an allyl terminated hyperbranched polyester as reactive modifier
(Elsevier, 2013-10-04)
Article
Accés restringit per política de l'editorialAn allyl terminated hyperbranched polyester (HBP) was added to an epoxy formulation containing a trithiol compound to perform a thiol-ene click reaction. By this procedure a flexible thioether network was formed. The ... -
Comparative analysis of stochastic network build-up methods for the curing of epoxy-anhydride thermosets
(2014-04-01)
Article
Accés restringit per política de l'editorialThe network build-up of epoxy-anhydride thermosets has been studied using two different stochastic network build-up methods based on the random combination of primary chains or simple fragments. Explicit expressions for ... -
Comparative curing kinetics and thermal–mechanical properties of DGEBA thermosets cured with a hyperbranched poly(ethyleneimine) and an aliphatic triamine
(2011-11-10)
Article
Accés restringit per política de l'editorialThe use of commercially available hyperbranched poly(ethyleneimine)s (Hbpei, LupasolTM, BASF) as curing agent of DGEBA has been studied. HBpei can react with epoxy monomers by an epoxy-amine condensation mechanism and get ... -
Corrigendum: Network structure and thermomechanical properties of hybrid DGEBA networks cured with 1-methylimidazole and hyperbranched poly(ethyleneimine)s
(2013-01-25)
Article
Accés restringit per política de l'editorial -
Crosslinking of mixtures of DGEBA with 1,6-Dioxaspiro[4,4]nonan-2,7-dione initiated by tertiary amines. I. Study of the reaction and kinetic analysis
(2008-08)
Article
Accés restringit per política de l'editorialThe anionic copolymerization of a Diglycidyl ether of bisphenol A (DGEBA) epoxy resin and a bislactone has been studied with different initiators. The kinetics of the process has been dealt with in detail, and it has ... -
Crosslinking of mixtures of DGEBA with 1,6-dioxaspiro[4,4]nonan-2,7-dione initiated by tertiary amines. Part IV. Effect of hydroxyl groups on initiation and curing kinetics
(Elsevier, 2010-01-06)
Article
Accés restringit per política de l'editorialThe anionic homopolymerization of DGEBA epoxy resin and its anionic copolymerization with a bislactone was studied using two alternative tertiary amines, 1-methylimidazole (1MI) and dimethylaminopyridine (DMAP) as initiators. ... -
Crosslinking of mixtures of diglycidylether of bisphenol-A with 1,6-dioxaspiro[4.4] nonan-2,7-dione initiated by tertiary amines: III. Effect of hydroxyl groups on network formation
(2009-12)
Article
Accés restringit per política de l'editorial -
Curado “Click” secuencial de mezclas tiol-acetoacetato-acrilato, catalizada por una fotobase latente
(2016)
Comunicació de congrés
Accés restringit per política de l'editorial -
Curat tèrmic i fotocurat de resines epoxi per al control químic de la contracció i millora de la degradabilitat
(Universitat Politècnica de Catalunya, 2009-07-10)
Tesi
Accés obertS’ha estudiat la copolimerització de resines epoxi amb una spirobislactona com a comonòmer per tal de controlar la contracció química durant el curat i millorar la seva degradabilitat per tal d’afavorir la seva recuperació ... -
Cure kinetics modeling and thermomechanical properties of cycloaliphatic epoxy-anhydride thermosets modified with hyperstar polymers
(2014-09-15)
Article
Accés restringit per política de l'editorialHyperstar polymers (HSPs) with hyperbranched aromatic polyester core and arms consisting of block copolymers of poly(methyl methacrylate) and poly(hydroxyethyl methacrylate) have been used as polymeric modifiers in ... -
Curing kinetics and characterization of dual-curable thiol-acrylate-epoxy thermosets with latent reactivity
(2018-01)
Article
Accés restringit per política de l'editorialA new dual-curing scheme was developed for thiol-acrylate-epoxy mixtures. A photo-initiated latent catalytic system was used to carry out thiol-acrylate Michael addition at 35 °C (Stage 1) followed by thiol-epoxy click ... -
Curing of off-stoichiometric amine–epoxy thermosets
(Springer, 2018-07)
Article
Accés restringit per política de l'editorialThe kinetics of the epoxy–amine polycondensation and the epoxy homopolymerization in off-stoichiometric epoxy/amine formulations with excess of epoxy groups, and in the presence of an anionic initiator have been investigated. ... -
Effect of a hyperbranched polymer over the thermal curing and the photocuring of an epoxy resin
(2011)
Article
Accés restringit per política de l'editorialIn this study, the authors study by calorimetry the influence of hyperbranched polyester Boltron®H40 on the thermal curing and the photocuring of a diglycidyl ether of bisphenol epoxy resin (DGEBA) using ytterbium (III) ... -
Effect of hydroxyl ended and end-capped multiarm star polymers on the curing process and mechanical characteristics of epoxy/anhydride thermosets
(2014-08-01)
Article
Accés restringit per política de l'editorialMultiarm star polymers have been synthesized by cationic ring-opening polymerization of epsilon-caprolactone from a hyperbranched poly(ethyleneimine) core and end-capped with acetic anhydride. These star polymers have been ... -
Effect of the network structure and programming temperature on the shape-memory response of thiol-epoxy "click" systems
(2015-10-01)
Article
Accés obertThis paper presents a new methodology to develop “thiol-epoxy” shape-memory polymers (SMPs) with enhanced mechanical properties in a simple and efficient manner via “click” chemistry by using thermal latent initiators. ... -
Efficient impact resistance improvement of epoxy/anhydride thermosets by adding hyperbranched polyesters partially modified with undecenoyl chains
(Elsevier, 2012-10-26)
Article
Accés restringit per política de l'editorialBoltorn H30 hyperbranched polyester has been modified by acylation with 10-undecenoyl chloride to obtain HBPs with different degree of modification. These HBPs have been used as reactive modifiers, in a proportion of 5 and ... -
Enhancement in the glass transition temperature in latent thiol-epoxy click cured thermosets
(2015-01-01)
Article
Accés obertTri and tetrafunctional thiol were used as curing agent for diglycidyl ether of bisphenol A (DGEBA) catalyzed by a commercially available amine precursor, LC-80. Triglycidyl isocianurate (TGIC) was added in different ... -
Enhancement of the impact strength of cationically cured cycloaliphatic diepoxide by adding hyperbranched poly(glycidol) partially modified with 10-undecenoyl chains
(2013-06)
Article
Accés restringit per política de l'editorialA hyperbranched poly(glycidol) has been synthesized and modified by acylation with 10-undecenoyl chloride to obtain hyperbranched polymers (HBPs) with different degree of modification. These HBPs have been used as reactive ... -
Environmentally-friendly processing of thermosets by two-stage sequential aza-Michael addition and free-radical polymerization of amine-acrylate mixtures
(2015-01-01)
Article
Accés obertA new dual-curing, solvent-free process is described for the preparation of tailor-made materials from off-stoichiometric amine-acrylate formulations. The first stage reaction is a self-limiting click aza-Michael addition ...
